*{
    padding: 0;
    margin: 0;
}
body {
    box-sizing: border-box;
    height: 100vh;
    background: url('https://picx.zhimg.com/v2-57337506e91fd52ac27b6d5159ee1a3b_r.jpg?source=1940ef5c') no-repeat;
    background-size: 100% 100%;
}